﻿// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
// Copyright (c) 2011, Dr. Masroor Ehsan
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
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//       derived from this software without specific prior written permission.
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using System;
using System.Collections.Generic;
using System.Linq;

namespace MaxTrader.Chronology
{
    public abstract class AbstractTimeframeMapper : ITimeframeMapper
    {
        #region ITimeframeMapper Members

        public virtual Timeframe Period
        {
            get { throw new NotImplementedException(); }
        }

        public abstract DateTime MapDateToPeriod(DateTime date);

        #endregion

        protected static DateTime RoundToHours(DateTime date, IEnumerable<int> hours)
        {
            var roundHour = hours.FirstOrDefault(h => date.Hour >= h);

            return new DateTime(date.Year, date.Month, date.Day, roundHour, 0, 0);
        }

        protected static DateTime RoundToMinutes(DateTime date, IEnumerable<int> minutes)
        {
            var roundMinutes = minutes.FirstOrDefault(m => date.Minute >= m);

            return new DateTime(date.Year, date.Month, date.Day, date.Hour, roundMinutes, 0);
        }
    }
}